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HT27LC020-32SOP Datasheet

  • HT27LC020-32SOP

  • x8 EPROM

  • 11頁

  • ETC

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HT27LC020
OTP CMOS 256K麓8-Bit EPROM
Features
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Operating voltage: +3.3V
Programming voltage
鈥?/div>
V
PP
=12.5V鹵0.2V
鈥?/div>
V
CC
=6.0V鹵0.2V
High-reliability CMOS technology
Latch-up immunity to 100mA from -1.0V to
V
CC
+1.0V
CMOS and TTL compatible I/O
Low power consumption
鈥?/div>
Active: 15mA max.
鈥?/div>
Standby: 1mA typ.
256K麓8-bit organization
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Fast read access time: -120ns
Fast programming algorithm
Programming time 75ms typ.
Commercial and industrial temperature range
Two line controls (OE and CE)
Standard product identification code
Package type
鈥?/div>
32-pin DIP/SOP
鈥?/div>
32-pin PLCC
Commercial temperature ranges
(0擄C to +70擄C)
General Description
The HT27LC020 chip family is a low-power,
2048K (2,097,152) bit, +3.3V electrically
one-time programmable (OTP) read-only mem-
ories (EPROM). Organized into 256K words
with 8 bits per word, it features a fast single ad-
dress location programming, typically at 75ms
per byte. Any byte can be accessed in less than
120ns with respect to Spec. This eliminates the
need for WAIT states in high-performance mi-
croprocessor systems. The HT27LC020 has
separate Output Enable (OE) and Chip Enable
(CE) controls which eliminate bus contention
issues.
Block Diagram
R o w
A d d re s s
C o lu m n
A d d re s s
C E
O E
P G M
X -D e c o d e r
C e ll A r r a y
V C C
Y -D e c o d e r
Y - G a tin g
G N D
V P P
C E & O E &
P G M & T E S T
C o n tr o l L o g ic
S A C K T
&
O u tp u t B u ffe r
D Q 0 ~ D Q 7
1
7th May
壟99

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